Some way away from her you lay all your satchels, you then lure her to them then blow it up. After this you use the tain (what the forgemaster has) to capture the things over her body
Yup, it worked. 15 satchets and many reloads it look. Phew. Thank you, Orlando and Baron.
But I would still like to know if there's any other way than to blow her up?